I need to edit a text file to insert multiple lines after a certain line with only features that come with windows 10
example: Insert the lines foo
and bar
after line 4
text file example before additions:
line 1
line 2
line 3
line 4
line 5
line 6
text file example after additions:
line 1
line 2
line 3
line 4
foo
bar
line 5
line 6
Read the file and write it back, insert the new lines at a specific lineno.
@echo off
setlocal DisableDelayedExpansion
set randomline=4
set "lineno=0"
(
FOR /F "delims=" %%L in ('findstr /n "^" sample.txt') do (
set /a lineno+=1
set "line=%%L"
setlocal EnableDelayedExpansion
if "!lineno!"=="%randomline%" call :insertblock
set "line=!line:*:=!"
(echo(!line!)
endlocal
)
) > output.txt
exit /b
:insertblock
echo foo
echo bar
exit /b